ALEXANDRIA, Va., June 19 -- United States Patent no. 12,330,452, issued on June 17, was assigned to BRIDGESTONE Corp. (Tokyo).
"Tire" was invented by Naohiro Hayashi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "The tire 10 comprises a widthwise narrow groove 8. The center-side narrow groove portion 8a is formed, from groove opening side to groove bottom side, in a shape of a continuous series of: a narrow section 8au including the groove opening; a tapered section 8at where the groove width increases toward the groove bottom; a wide straight section 8as extending in the groove depth direction with a constant groove width and having a groove width greater than that of the narrow section; and an arc-s...